Table 2.

Association between impaired CVR and the development of stroke in patients with asymptomatic carotid stenosis

Study (year)	Number of patients	Patients with impaired CVR	Mean follow-up (months)	OR (95% CI)
Gur et al 42 (1996)	44	21/44	24	22.50 (1.44 to 1054.40)
Silvestrini et al 43 (2000)	94	40/94	28.5	3.72 (1.05 to 14.85)
Markus and Cullinane44 (2001)	107	NM	21.7	14.4 (2.63 to 78.74)
Kimiagar et al 45 (2010)	35	21/35	48	6.50 (0.65 to 315.02)
King et al 46 (2011)	106	32/106	22.7	3.62 (0.61 to 21.74)

CVR, cerebrovascular reserve; NM, not mentioned.